For users unfamiliar with the system, there are a few general points to keep in mind.对不熟悉这套系统的用户来说，有几条通则需要记住。It is important to keep in mind the historical dimension to these issues.把这些问题的历史背景记忆在心是很重要的。Here are some important points to keep in mind...这里有几个要点需要记住⋯